What is premature ovarian insufficiency?
When we talk about premature ovarian failure or premature ovarian insufficiency (POI) we are referring to a premature decline in ovarian function. In simple terms: the ovaries stop ovulating earlier than expected and, as a result, the production of oestrogen and progesterone drops — which can lead to irregular periods or the absence of menstruation altogether. The Spanish Fertility Society recommends the term POI; we use both (POI/POF) to avoid confusion among patients who read different sources.
The prevalence reported in the literature — and reflected in our clinical practice — is low but real: roughly 1 in 100 women under 40 and 1 in 1 000 under 30 may be affected. In our consultations we often say: “if amenorrhoea lasts more than three months, we act fast: medical history, hormonal blood work and key genetic tests.” That speed makes a difference because it allows us to guide the diagnosis and plan fertility options.
Is it the same as early menopause? They are similar, but not identical. Early menopause implies a definitive end to menstruation before age 40; in POI there may be sporadic ovulations and intermittent periods. Understanding this distinction helps explain why some patients with POI achieve pregnancy with their own eggs, while others will need egg donation.
At Love Fertility we like to frame POI as a process: understanding what is happening, looking after your overall health and, if you wish, planning how to become a mother with realistic expectations.
How it affects ovulation, hormones and menstruation
Under normal conditions the brain regulates the ovaries via hormones (FSH and LH). When POI appears, the ovary responds less effectively: the follicle reserve decreases, oestrogen production falls and the brain “turns up the volume” on FSH in an attempt to stimulate it. Clinically this translates into increasingly irregular cycles leading to amenorrhoea. Many patients tell us about hot flushes, fatigue and sleep changes — it is not “all in your head”; there are hormonal bases that explain it.
We are very careful with language: we speak clearly, without alarm, but with rigour. “The Spanish Fertility Society recommends the term Premature Ovarian Insufficiency; we use both terms to avoid confusion” is a phrase we repeat because it provides reassurance and clarity.
Causes of POF/POI: genetic, autoimmune, iatrogenic and environmental
POI is multifactorial and, yes, in many cases the cause is idiopathic (unknown). Even so, it is worth investigating:
Cancer treatments and ovarian surgery
Chemotherapy and radiotherapy can damage ovarian follicles. Certain surgeries (such as partial or total removal of an ovary) also reduce the reserve. If you are about to undergo cancer treatment, fertility preservation beforehand is key — we cover the options below.
Fragile X syndrome, Turner syndrome and other chromosomal abnormalities
Genetic alterations such as FMR1 gene premutation (associated with Fragile X) or Turner syndrome increase the risk. At Love Fertility we usually include a karyotype and FMR1 test when the clinical picture suggests it (age, symptoms, family history).
Toxins (tobacco, pesticides) and idiopathic causes with a family history
Tobacco, certain pesticides and other toxins have been linked to poorer ovarian function. Additionally, when there is a first-degree family history the risk may be higher, even if no specific gene is identified.
When we follow a structured approach (iatrogenic, genetic, autoimmune and lifestyle causes), patients tell us they “finally” feel there is a plan — not just a diagnostic label.
Symptoms and warning signs: when to seek advice
The symptoms resemble those of perimenopause:
- Amenorrhoea or very widely spaced periods (more than 3 months without menstruation).
- Hot flushes and night sweats.
- Sleep disturbances and emotional irritability.
- Vaginal dryness and decreased libido.
Checklist for booking an appointment (if you recognise yourself in 2 or more, come and see us):
- Cycles that have become spaced out or have disappeared for ≥ 3 months.
- Hot flushes and mood changes not explained by other causes.
- Difficulty sleeping and vaginal dryness affecting your sexual wellbeing.
- History of chemotherapy/radiotherapy, ovarian surgery or close relatives with very early menopause.
Love Fertility tip: bring a record of your last 6–12 cycles and any previous blood work. It helps us speed up decisions.
How it is diagnosed: medical history, examination, hormonal blood work and genetic tests
Diagnosis is not a single test; it is a process:
- Detailed medical history (age, cycles, symptoms, family and oncological background, lifestyle).
- Gynaecological examination and general assessment.
- Hormonal blood work: we usually request oestradiol, FSH and prolactin (among others). Depending on the case, also AMH (Anti-Müllerian Hormone) as a marker of ovarian reserve.
- Genetic studies: karyotype to rule out chromosomal abnormalities and FMR1 gene test when indicated by clinical findings or family history.
- Additional tests depending on results (autoimmunity, thyroid, bone densitometry where appropriate).
“In our practice, when amenorrhoea lasts more than three months, we act fast: medical history, hormonal blood work and key genetic tests.” This approach avoids months of uncertainty and allows us to discuss options as soon as possible.
FSH, oestradiol and other hormones (prolactin, AMH)
Without going into specific numbers (each laboratory has its own reference ranges), the typical pattern in POI is elevated FSH with low oestradiol. AMH is usually reduced, but we always interpret it in context (age, clinical picture, ultrasound scan).
FMR1 test and karyotype: when are they indicated?
We request them when the history suggests a possible genetic origin (family background, clinical features) or in cases of very early-onset POI. These results guide reproductive counselling and, in some cases, genetic counselling for the family.
Medical treatment for your health: hormone therapy, vitamin D and calcium
Our immediate goal is to look after you today and protect your long-term health.
Symptom relief and osteoporosis prevention
Oestrogen therapy (as part of individualised hormone replacement therapy) can relieve hot flushes and protect bone mass. We complement it with vitamin D and calcium when appropriate, alongside habits that truly make a difference: weight-bearing exercise, safe sun exposure and avoiding tobacco.
Long-term follow-up (bone, cardiovascular and emotional wellbeing)
We schedule regular check-ups to monitor bone health, cardiovascular profile and sexual wellbeing. The emotional impact is real, and it is normal for it to hurt. “We work in a multidisciplinary way to personalise diagnosis, treatment and emotional support.” At Love Fertility, psychology, gynaecology and nutrition work hand in hand.
Can you become a mother with premature ovarian insufficiency?
The short answer: yes, with nuances.
When it is possible with your own eggs
In POI there may be intermittent ovarian activity. In some cases, with close monitoring and carefully planned ovarian stimulation cycles, pregnancy with your own eggs is achieved. We do not promise miracles — we promise realism and opportunities when they exist.
Egg donation: how the process works and realistic expectations
When the ovary no longer produces viable oocytes, the pathway with the highest probability of success is egg donation. We explain it without beating around the bush: “Yes, it is harder to achieve pregnancy, but there is a ray of hope: in some cases with your own eggs and, above all, through egg donation.” The process includes rigorous donor selection with phenotypic and genetic matching, endometrial synchronisation and emotional support at every step. The focus is always on you making informed decisions.
Fertility preservation before cancer treatment
If you have been recommended chemotherapy/radiotherapy, we can carry out egg freezing (vitrification) or ovarian tissue cryopreservation before you start (depending on your case). The sooner we discuss it, the more options you will have.
Living with POI: sexuality, self-esteem and your support network
POI does not define who you are. It can, however, affect your libido, your comfort in relationships and your self-esteem. We work on strategies for vaginal dryness (suitable lubricants, pelvic floor physiotherapy) and approaches to help you reconnect with your body through self-care. Building a support network (partner, family, support groups) makes a big difference. We always say: ask for help — it is not weakness, it is health.
Frequently asked questions about POI
Not exactly. In POI there may be sporadic ovulation; in early menopause the cessation is definitive.
Yes, and that is precisely why we recommend follow-up: those windows may open up options with your own eggs.
Medical history, examination, FSH/oestradiol/prolactin, and depending on the case AMH, FMR1 and karyotype.
It is individualised. We assess benefits and contraindications and review periodically.
No. We will discuss realistic strategies: attempts with your own eggs when there is scope and egg donation when it is the most effective pathway.
When to come and see us: how we work at Love Fertility (team and your next appointment)
At Love Fertility Clinic we are a predominantly female team and we love to speak clearly, with rigour and warmth. Multidisciplinary means that gynaecology, reproductive endocrinology, genetics, psychology and nutrition design your plan with you. If you have gone ≥ 3 months without a period, you have symptoms consistent with POI or you are concerned about your fertility, book a first appointment. Bring your reports — we provide the roadmap and walk at your pace.
Premature ovarian insufficiency is not a full stop — it is a call to get informed, look after yourself and make decisions. With early diagnosis, appropriate symptom management and an honest reproductive plan, you can take back control. And if your goal is to become a mother, pathways exist: sometimes with your own eggs and, in many cases, through egg donation. We are here to support you — closely and expertly.
